Jack-hammer shank and collar machine



f R. c. HARTlN. JACK HAMMER SHANK AND COLLAR MACHINE.

APPLICATION FILED AUG .25, I920.-

Patented Dec. 5, 1922.

2 SHEETS-SHEET l A TTORNEY R. c. HABTIN. JACK HAMMER SHANK AND COL'LAR MACHINE.

APPLICAT ON FILED AUG.25, I920.

Pa tented Dec. 5,1922.

2 SPEETSSHEET 2 m E w V w a. i: 1 wm-m i R O W R A TTORNEY Patented Den 5, 1922,

nine rams ROBERT C. HARTIN, OF SAN DIEGO, CALIFORNTA, ASSIGTVOR F ONE-THIRD '10 DAVID H. BILES AND ONE-THIRD TO GARSON F. RYER, BOTH OF PRESCOTT,

ARIZONA.

JACK-HAMMER snnmr AND cornea rmcnrnn.

' Application filed August 25, 1920. Serial No. 405,883

To all whom it may concern:

Be it known that I, RoBnRr C. HARTIN,

Collar Machines, of which the following is a specification. I

My invention relates to a machine for forming'the collar of a jack hammer shank and collar. A jack hammer is otherwise known as a hammer drill, a power hammer for drilling in mums and quarries and theobjects of my invention are: First, to provide a machine for making jack hammer shanks and collars which greatly facilitates the making of the same; second, to provide a machine of this class, one portion of which clamps the shank while the other portion of the shank is forced endwise upsetting the metal and forming the collar; third, to provide a machine of this class with interchangeable and adjustable parts for making the shank and collar and fourth, to provide a machine of this class which is very simple and economical of construction, durable, easy to operate, efficient in its action and which. will not readily deteriorate or get outof orden With these and other objects in view as will appear hereinafter my invention consists of certain novel features of construction, combination and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings andfito the characters of reference thereon which form a part of this application in which Figure 1 is a side elevational view of my machine showing a portion broken away, showing a shank in position therein by dotted lines and showing the collar portion upset; Fig. 2 is an end elevational view of said machine; Fig. 3' is a top or plan view thereof; Fig. 4 is a sectional view through 4l4 of Fig. 1; Fig. 5 is a sectional view through 55 of Fig. 1 and Fig. 6 is a sectional view through 6 6 of Fig. 1.

Similar characters of reference refer to similar parts and portions throughout the several views of the drawings. 1 0

The supporting leg members 1, main frame member 2, eccentric lever support 3,

lever 4, plunger member 5, plates 6 and 7,

clip 8, clamp member 9, inclined pin member l0, shank support 11 and shank supporting members 1.2 and 13 constitutes the principal parts and portions of my ack hammer shank and collar machine. r j

The supporting membersl are preferably metallic members of inverted U shape and serve as supports for the frame 2, they being provided with a flat base portion 1 upon which the frame member 2 is secured by means of bolts 2 Near the one end of this frame member 2 is mounted a shaft 2 and extend ng from one side thereof and on the eXtended end of this shaft/2 is secured the lever support 3 which is an eccentric shaped member provided with an eccentrically positioned semicircular slot 3 in one side thereof adapted for the lug 5 on the member 5 to rest in and its outer'edge 3 is adapted to engagethe shoulder 5 on the plunger member 5 thusproviding for the reciprocation. of the plunger member 5 with the backward and forward movement of the lever support 3 on the shaft 2 This lever support 3 is provided with a socket portion 3 in which is mounted the one end of the lever t thus providing a removable lever for operating the lever support 3. The plunger member 5is positioned againstthe flat side surface 2 of'the member 2 in a recess 2 and is held in position by means of the plates 6 and 7 which extend over the upper and lower sides of the plunger member 5 and hold it in position but permit it to reciprocate in the recess 2 andbetween said plates and the surface 52 of the frame 2. This plunger member 5 is provided with a lug 5 on its outer side which engages the end of the shank support 11 which is a rectangularly shaped support provided with a recess 11 in its one end conforming to and adapted to receive the end of the jack hammer shank and secured to this plunger memher 5 by means of bolts'8 is the clip member 8 which is an ofi'set member which is adapted to fit around. the one end of the member 1.1 and hold it rigidly against the plunger member 5 and it is provided with a set screw clip member 9 by, means of bolts 9 and this clip 9 is provided with a slot 9? extending vertically therethrough which is tapered on its outer side adapted to receive the pin 10. lilounted in this clip member 9 between the pin 10 and the side of the main frame 2 is the shsnlr support, consisting of the members 152 and 13, the member 13 being provided with a slot 18 therein adapted to receive the straight side of the pin 10 so that when the pin 10 is driven into position in the clip 9, the one side engages the slot 13* in the member 13 and its other side engages the opposite side of the slots 3 in the clip 9 thus providing a wedge for clamping the members 12 and 13 together. The member 13 is also provided with two extended pins 13 which are adapted to fit into conforming holes in the member 12 for preventing the end shift of the member 12 relatively to the member 13 and when the members 12 and positioned together there is provided a hole therein adapted to fit the shank which is to be upset and the end of the shank is rigidly clamped by the wedge member 10 driven into the'clip 9 and against the face of the member13 thus providing for readily securing the shank member between the members 12 and 13, then with the movement of the lever t the eccentric portion of the lever support 3 engages the plunger member 5 moving ittoward the member 12 carrying with it the support 11 and upsetting the metal of the shank between the clips 8 and 9 as shown best by dotted lines in Fig. l of the drawings.

Though if have shown and described a particular construction, combination and arrangement of parts and portions I do not wish to be limited to this particular construction, combination and arrangement but desire to include in the purview of my invention the construction, combination and arrangement substantially as set forth in the appended claims.

Having thus described my invention what I claim as ncwand desire to secure by Letters Patent is:

' 1. A machine of the class described, including a supporting frame. a clamp means secured thereto, a plunger member reciprocably mounted on said supporting frame provided with a lug extending from one side thereof and a leve member provided with an eccentric semi-circular slot in one side thereof adapted to engage the lug on said nlun 'er member whereby said 3lun- L c: v A ger member is reciprocated by mg movement of the lever.

L116 recipromachine of the class described, ina supporting frame, a clamp means 7 hereto, a plunger member reciprocably mounted on said supporting frame provided with a lug extending from one side thereof and a love member provided with an eccentric semi-circular slot in one side thereof adapted to engage the lug on secured to said supporting said plunger member whereby said plunger member is reciprocated by the reciprocating movement of the lever, and means for sup porting a jack hammer shank secured in said clamp member and said reciprocating member.

A machine of the class described, including a supporting frame, an eccentric lever mounted thereon, provided with an eccentric semi-circular slot in one side there of. a plunger reciprocably mounted in said supporting frame provided with a lug eX- tending from one side thereof adapted to engage said slot operative by said eccentric lever and aclamp secured to said supporting frame in alinement with said member.

4. A machine of the class described, ineluding a supporting frame, an eccentric lever mounted thereon, provided with an eccentric semi-circular slot in one side thereof, a plunger reciprocably mounted in said supporting frame provided with a lug ex tending from one side thereof adapted to engage said slot operative by said eccentric lever, a clamp secured to said supporting frame in alinement with said plunger member comprising a U shaped clip secured to said supporting frame provided with a tapered slottherein, a tapered pin adapted to fit in said slot and a pair of clamp mem-- bers, one of which is provided with a slot adapted to be engaged by said tapered pin for clamping said members against the jack hammer shank.

A machine of the class described, including a supporting frame, a shaft mounted in one end thereof, an eccentric lever provided with'an eccentric semi-circular slot in one side thereof mounted on said shaft, a plunger member reciprocably mounted in said frame provided with a lug extending from one side thereof adapted to engage said slot for reciprocating the same, a clip member mounted on said plunger member and a jack shaft support provided with a: recess adapted to receive the end of the jack shaft secured in said clip and a clamp member secured to said supporting frame in alinement with the jack hammer shank support.

6. A machine of the class described, including a supporting frame, a shaft mounted in one end thereof, an eccentric lever provided with an eccentric semi-circular slot in one side thereof mounted on said shaft, a plunger member reciprocably mounted in. said frame provided with a lug extending from one side thereof adapted to engage said slot for reciprocating the same, a clip member mounted on said plunger member, a jack shaft support provided with a recess adapted to receive the end of the jack shaft secured in said clip, a clamp member frame in aline plunger ment with the jack shaft support including a U shaped clip secured to said supporting frame provided with. a tapered slot there in, a tapering pin adapted to fit in said slot and a pair of clamp members, one of which is provided with a slot adapted to be engag-ed by said tapered pin for clamping said members against the jack hammer shank.

In testimony whereof, I have hereunto 10 set my hand at San Diego, California, this 19th day of August 1920.

ROBERT C. HARTIN. 

